Frame for the horizontal development of film plates



July 10, 1923. 1,461.321

' P. MATHIOTTE FRAME FOR THE HORIZONTAL DEVELOPMENT OF FILM PLATES Filed Aug. 9, 1922 P 1; l MA HId TTE lNViENTOR;

Patented July 10, 1923.

UNITED STATES PATENT OFFKIE.

PAUL MATHIOT'IE, OF NEUILLY-SUR-SEINE, FRANCE, ASSIGNOR TO PA'IHE CINEMA, ANCIENS ETABLISSEMENTS PATHE FRERES, OF PARIS, FRANCE.

FRAME FOR THE HORIZONTAL DEVELOPMENT OF FILM PLATES.

Application filed August 5), 1922.

T 0 ca whomit may concern:

Be it known that 1, PAUL Mnrniorrn, citizen of the French Republic, residing at Neuilly-sur-Seine, Seine, in the Republic of France, have invented new and useful improvements in Frames for the Horizontal Development of Film Plates, of which the following is a specification.

Up to the present time, the development of film plates and other similar films has been effected by the use of clamps which seize the film by two of its edges, or by the use of frames for development in a vertical receptacle.

The present invention has for its object a frame for the horizontal development of film plates which comprises a frame body of rectangular shape, preferably metallic. provided with two handles and angle shaped brackets which protrude under the frame in order to separate the film plate from the bottom of the basin in which the film plate is treated, said brackets carrying stud shafts upon which cam shaped levers are pivoted, which latter are adapted to clamp the film plate upon the frame body.

Other characteristic features of the invention will appear from the following descrip tion.

This new frame permits the development in a horizontal receptacle and therefore the constant observation of the progress of the development. It does not require any special developing appliances and permits of using what is found in all developing installations. It obviates putting the fingers in the bath as with the clamps, and touching the film with the fingers when the latter is in the bath. The manipulations are rendered very easy without fear of scratching the film. In the present frame, the method of securing the film to the frame is easy and very rapid, it can be effected easily in the dark room, and it maintains the film rigid and fiat and thus obviates all deformations. It affords a great facility of manipulation for the different operations of developing and fixing, the films always remaining in the frame.

In the accompanying drawing which shows by way of example a form of construotion of the invention:

Fig. l is the perspective view of the Serial No. 580,599.

frame. One has indicated in broken lines the open position of the devices for securing tile film plate, not shown on the frame.

Fig. 2 is a longitudinal section on i\-A Fig. 1. One has indicated in broken lines the film plate.

Fig. 3 is the transverse section on B--B, Fig. 1, the plate is also shown in broken lines.

As shown in the drawing, the frame is composed of two small angle bars a and 5 connected together by two flat bars 0 and (Z. Upon these bars 0 and d are secured the manipulating handles 0 and f.

To the angle-bars a and l) are secured the angle brackets g forming spacing members at 9 under the frame and carrying on their vertical web the pivot it of the small swinging levers 75 which serve to secure the film plate on to the frame. To this end these levers carry at n a portion forming an eccentric and when one turns the levers 7c in the direction of the arrows 0, one will assure the maintenance of the plate m on the anglebars a and Z) of the frame between said angle-bars and the eccentric pieces a, the clai'nping movement also affording, accord ing to the direction of the action upon the levers 7c, the tension of the film. To remote the film m, it suffices to act. upon the levers in the contrary direction to 0, and immediately, as the film is no longer clamped, it is simply necessary to remove it.

This frame is constructed of a non-rusting metal which has no action upon the bath, but it can also be composed of any other metal; nickel or German silver, or other substance; ebonite, celluloid, etc., hav ing no action on the baths.

Various modifications in detail may naturally be made in the frame described without for this reason departing from the invention.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A frame for the horizontal development of photographic film plates, comprising a rectangular frame body, two handles secured on said frame body, angle brackets secured on said frame body, said brackets protruding under the bottom face of the frame body, stud shafts on said brackets and cam shaped levers pivoted on said stud shafts and adapted to clamp the film plate ing a rectangular frame bodyy two' handles,

secured onsaid; frame body, angle-brackets secured on said frame body, said brackets protruding" under the bottom =face of-"the frame body, stud shafts on said brackets and cam shaped levers pivotedon said'stud shafts and adapted to clamp the film plate upon the frame body, the portions of said levers which-act upon thefilm-plate; being so shaped -fthat the film-plateis clamped upon 15 --the frame body by a swinging movement of said portions away from each other, where- --by the fi-Im plateis -stretehed at the same time as it is clamped upon the frame.

testimony whereof I'have signed my 20 name to this specification.

PAUL MATHIOTTE. 

